. >> crowds packed san francisco tonight as first of major weekend events get underway. good evening. >> i'm gasia mikaelian. san francisco is gearing up to host a diverse set of events this weekend expected to attract a million people to the city. for anyone thinking of attending, there's a warning from officials, plan ahead and bring your patience. we have live team coverage. tell us about fleet week events. with begin with matt keller on the crush of people descending on the family. >> reporter: we're here at at&t park. expected to bring traffic to a standstill. >> performed for thousands of people in golden gate park to end the first day of the bluegrass festival. >> it was a huge event. been mellow. >> with events like this all across the city. the traffic will be anything but mellow. expecting a million visitors this weekend for the hardly strictly bluegrass festival. cup races, castro street fair and playoff games. >> if anything else, take public transportation. >> police and transportation officials recommend you do the same. extra bart cars, buses, fer ees and